DICOM Correction Item

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CP-378 Date 2004/01/12 ISO-2022-JP-2 Status: Letter Ballot

2 DICOM Correction Item

Correction Number CP-378 Log Summary: Add comparison with ISO-2022-JP-2 for Japanese character sets Type of Modification Name of Standard Correct Value PS 3.5 2003 Rationale for Correction PS 3.5 Section H.2, compares in informative text the use of the ISO 2022 code extension techniques in DICOM and the Internet practice of ISO 2022-JP.

There exists and additional, less frequently used, Internet practice referred to as ISO-2022-JP- 2. ISO-2022-JP-2 is similar to ISO-2022-JP and the code extension techniques used in DICOM, with one notable exception, the requirement to return to a single-byte character set before encoding a SPACE.

This CP adds ISO-2022-JP-2 to the informative comparison of DICOM with Internet practice. Sections of documents affected PS 3.5 Section: H.2 Correction Wording:

4 Add to PS 3.5 Section 2 Normative References

6 RFC 1468 Japanese Character Encoding for Internet Messages

Note: RFC 1468 is available from “ http://www.faqs.org/rfcs/rfc1468.html ”. 8

RFC 1554 ISO-2022-JP-2: Multilingual Extension of ISO-2022-JP

10 Note: RFC 1554 is available from “ http://www.faqs.org/rfcs/rfc1554.html ”.

Amend PS 3.5 Annex H Section H.2: 14 H.2 INTERNET PRACTICE DICOM has adopted an encoding method for Japanese character sets that is 16 similar to the method for Internet practice. The major protocols for the Internet such as SMTP, NNTP and HTTP adopt 18 the encoding method for Japanese characters called “ISO-2022-JP” as described in RFC 1468, Japanese Character Encoding for Internet Messages. 20 There is also a less commonly used Internet practice called “ISO-2022- JP-2” described in RFC 1554, which supports a larger repertoire of 22 character sets and additionally requires an escape to a single-byte character set before encoding a SPACE (unlike DICOM and ISO-2022- 24 JP).

1 CP-378 Date 2004/01/12 ISO-2022-JP-2 Status: Letter Ballot The method of encoding Japanese character sets in DICOM is almost 2 the same as ISO-2022-JP except for the following. The cCharacter sets supported for the Japanese language in DICOM and 4 Internet practice are:

DICOM ISO-2022-JP ISO-2022-JP-2 ASCII (ISO-IR 6) ASCII (ISO-IR 6) ASCII (ISO-IR 6) JIS X 0201 Katakana (ISO-IR 13) JIS-X 0201 Romaji (ISO-IR 14) ISO8859-1 (ISO-IR 100) JIS X 0201 Romaji (ISO-IR 14) JIS X 0208-1978 Kanji (ISO-IR 42) ISO8859-7 Greek (ISO-IR 126) JIS X 0208 Kanji (ISO-IR 87) JIS-X 0208 -1983 Kanji (ISO-IR 87) JIS X 0201 Romaji (ISO-IR 14) JIS X 0212 Kanji (ISO-IR 159) JIS X 0208-1978 Kanji (ISO-IR 42) JIS X 0208-1983 Kanji (ISO-IR 87) JIS X 0212-1990 Kanji (ISO-IR 159) GB2312-1980 (ISO-IR 58) KSC5601-1987 (ISO-IR 149)

6 Control Character sets supported in DICOM and Internet practice are:

DICOM ISO-2022-JP and ISO-2022-JP-2 LF (00/10) LF (00/10) FF (00/12) CR (00/13) CR (00/13) SO (00/14) ESC (01/11) SI (00/15) ESC (01/11)